Flexible hose



Oct. 7, 1952 c. P. KRUPP 2,612,910

FLEXIBLE HOSE Filed NOV. l2, 1948 2 SHEETS--SHEET l l [555D] @UFF 29 '57- '%/-Q Oct. 7, 1952 C, p. KRUPP 2,612,910

FLEXIBLE HOSE Filed NOV. l2, 1948 2 SHEETS-SHEET 2 555502Z F- Hmm:y

extreem Patented Oct. 7, 19u52 Pn lorries 'Appnenmnovenper 12,1943, serialNo, 5955100 l `'This invention relates 'A to the manufacture of hose and is especially useful 'jin ithe *manufacture oi hose dofrelativelythn wal-land large diameter although? the invention: isilso-useful'fln uthe Imanuiactureof other `hose'onreinforcezltubing.

In the manufacture of 'thinewalled hose it has been `the practice to Wind-rubberized fabriczupon itself to "provicle'ja tubular `body 4which may have a lining of 'rubber-like 1material and unay also have an outer cover of.rubb'erlikemaiterial. For use in extinguishing fires Tand for 'other emergency purposes Where' it 'istieSired-tohandlehose with speed, it "hasibeenl'found that the light- Walled `hose ten-ded" to; stretch unequallyat `different zones about its =circumference 'when lunder pressure "thereby `ben" :lin',;,f thel'hose. Such `.hose must be light in Weightto facilitatehandlingnnd must ibe adapted to" loeia'tier-red-reafdily` toJ permit reeling;

The rpresent invention aims Jto provide 'la V"hose :nieuwe (on. 13S-s55' .l

construction which Willlay straight Whenfunder pressure and Which-may bef'attenedforreeling, @ther objects o'f the 'invention 1ere to Iprovide a balanced arrangement-fof spl-loes, fto provide-a novel f method? of manufacture, fand to i'provide -a light `-`Weightvr hose suitable or'frepidv coupling.

These and `other obj ects fwill 'appear from the following `iescnipton #and the 'accompanying drawings.' ofithedrawings,

lFig; '"l' islafs'ideielevation f `a hose constructed infacconfiance with andembodyngthelnvention. F'gt 2l is across-seotionalfvlew thereof-'tekenen l Fig; 3 `isalview similarto' Fig. zshowin'g another l embodiment of the invention.

Fig. 4 is a view of apparatus whichimay tbe employed in constructing'` thehosefof the invention. l

Fig. 5 is a `Viewillustratingenothenmethod o'f producing'the hose oftheinvention.

:Figi 6 1 is f a vie'w showing twoffsections ofi hose of the invention l withiiexible those coupling membersapplied thereto.

Referring .Ito :the :drawings .thei'numeral SIU designates ian imperviousftubular lining; offrubber composition or :otherfrubberlllke material. About the! liningzand enclosingiitne fsameiarevstrips 'I l. l 2, 1 i3, zand I M of fabriczextending"longitudinally ofthe hose. These. strips 'have overlappingflongitu'dinal'f margins providing a lapped seams 115, 1 i6, I T; lflequally spacedfrom each rotherboircimiterentially of. the hose inbalanced relation. Intthe embodimentmf:thezrinventionilIustratedin'fElgiz, eachsstrip :,exceedslin -wldthi oneahalfzof thereincumferenoeof the'fhose, Vtherebyprovivzling two layerso'fifabric loe'tw'eenieachfovvo#seemsandthree layer-s of ffabric at ieachseam `so Fthat roner-plyioi fabric fexten'ds entirely v-through -the Lseam.. -lellso each strip -of fabric extends Joireuml?erentially throug'hzthree o'ftlrev seams. l

In the form vof ythe invention i shown `in 'Fig. '12, each 4strip of `fa'lnic f extends in a `counter-clock wise :direction wvithfone margin #thereof adjacent the fruliberliriingf of 'the hose anili-thefother marforcement. Thestripslmay alsobe'arranged to extend in aclook-wisedirectionilffdesired. nlAll of the *strips are iof the isame Width `and stretchability.j l 1 f l In the form of the invention illustrateufinig. 3, the strips of l `fabric varese-arranged *that-both margins v12l, 22 of estrip "210111are fat positions adiaf centftherubber liningfthestrip 23 hasbothits Iriargins:` 254, 25 at -the `outer `incefof the lhose, l the strip 426 has one'margin-2-'l betweenfstr-ips Eiland 213"and `*its othermargin"2B-'at the outeriace of the hose, and the-strip 29 hasone `margin F30 adjacent the hose lining andritsf other; margin `3 l between strips `MVand 23. lIn'th-is embodiment, the strips 2311,` 23, '26and29 are lall'offthe same WidthV- and/provide overlapping' longitudinalseams ydegreesroffthe circumferencelplusthezwidthmf t strengths. Asatheiforce due ,tending f. to Fsplit `itllenfriose ffleligbhwise is `@always example three, in which caset'he strlpsieach-have afseam. fInf anywcaseythe'width of ,therstrips is equal .:to the ficircumference of :theffhose divided by tonal-half off'thef'num'berofi strpsplus `the width o'f overlapof the'seamstdesired.

A(Ihe 4fabric :strips zare preferably of :square woven or :otherw woven i fabric with the-warp elements crunning lengthwise ofifthexstrips:andf the weftielements:crosswise thereof endrthewarpand `weft elementstheyt.` be f of `theesame or different ofyinternaltpressure the mandrel by feed rollers 50, i.

twice as great as vthe force of internal pressure tending to separate the hose on a plane perpendicular to its axis, the elements of the strip extending crcsswise thereof or circumferentially of the hose may be made stronger than the elements extending lengthwise of the strips or longitudinally of the hose,'if desired, for economy of material. The strips are coated With adhesive rubber or other rubber-like material to provide good adhesion of'the strips to each other.

As the thickness of reinforcing material at the-y seams is greater than that between the seams the hose has greater resistance to stretching at the seams.v Since the seams are all of equal width and are equally spaced about the hose, the construction is balanced and internal pressure` in the hose does not bend the hose.

In the manufacture of the hose of this invention, the strips of fabric may be fed over a stationary mandrel and assembled thereabout in the desired overlapping relation; This is illustrated in Fig. 4 where the numeral lill designates a stationary mandrel supported by an arm 4i at one end thereof. A strip 42 of unvulcanized rubber or other rubber-like material may be advanced from any source, such as a supply roll (not shown) along theA mandrel and through a stationary folder or formerB Where'it is foldedl into overlapping relation of its margins and about the mandrel. To permit travel of the strip along the mandrel a coating 44 ofsoapstone powder-or other lubricant may be applied to the inner face y of the strip except along the margin 45 which is left adhesive for providing the overlapping seam. The lubricant dust may be applied by` a sprayV pipe 46. k

After the rubber lining has been formed about the mandrel, the lining so formed isdrawn along i Betweenthe feed rollers 50,5! and the folder 43 a series of folders 52, 53, 54, 55 corresponding in number to the fabric reinforcing strips are fixedialong the mandrel. The first fabric strip 55 is fed from a supply (not shown) over a guide roller 57 and about the former 52 into engagement with the rubber lining. The second strip 60 is fed over a guide roller 6| into the desired overlapping relation withstripit.l The third strip 62 is similarly fed over roller 63 and about former 54and the fourth strip 64 is fed over guide roller 55 to former 55. The formers 52, 53, 54, 55 may be arranged to feed the strips into the desired overlapping relation as shown in Fig. 2 or as in Fig. 3. The assembledhose is withdrawn by rollers 50, 5i and may be vulcanized in any desired manner. l .f

The hose of the invention is especially desirable for use with the couplings shown and described in my copending application Serial No. 792,531, led December 18, 1947, entitled Hose Coupling Patent No. 2,567,773; Wheresuch couplings are tobe employed, the hose may be cut to the desired lengths. beforev being `vulcanized andthe voverlapped andk joined together,` longitudinal margin to longitudinal margin on a dat table.

" Variations may be made without departing fromlthe scope of the invention as it is' defined bythe following claims.

I claim:

l. A flexible hose. comprising a tubular wall having a reinforcement of square-woven fabric f strips ,extending longitudinally of the hose, said strips being of width less than the circumference of the hose and overlapping each other at longitudinal margins thereof to provide a plurality of lapped seams extending longitudinally of the hose in equallyspaced-apart relation thereabout and of equalextensibility, said strips each be'- ing equal inrwidth to the circumference of the hose divided by one half of the number of strips Aplus the width of aseam and one of said strips having both its margins exposed at the outer face of the reinforcement.

v2'. A' flexible hose comprising a tubular wall of strips of woven fabric extending longitudinally of the hose With their vmargins in overlapping relation and providing seams spaced apart unilformly throughout the circumference `of the hose, said overlapping seams being of equal extensibility and thematerial between successive seams being of uniform thickness and extensibility, eaoh strip comprising warp elements extending longitudinally thereof and weft elements extending circumferentially Vof the hose, said longitudinal elements being of less strength than the elements extending circumferentially of the hose, and the uniform extensibility of the strips and uniform distribution of the seamsdproviding balanced resistance to elongation about the wall under fluid pressure Within the hose.

v 3. A flexible hose comprising a tubular wall of strips of woven fabric extending longitudinally of the hose with their margins in overlapping relation and providing seams spaced apart uniformly throughout the circumference of the hose, and overlapping seams being of equal extensibility and the material between successive seams being of uniform thickness and extensibility, and each of said strips spanning atleast three of said seams.` Y

4. A flexible vhose comprising a tubular wall of strips of woven fabric extending longitudinally of the hose with their margins in overlapping relation and providing seams spaced apart Vuniformly throughout the circumference of the hose, and overlapping seams being of equal extensibility and the material between successive seams being of uniform thickness and extensibility, said wall being at least equal in thickness to two of said strips at all positions between said seams.

5. A flexible hose comprising a tubular wall of strips of-wcven fabric extending longitudinally of the hose with their margins in overlapping relation and'providing seams spaced apart uniformly throughoutv the circumference of the hose, and overlapping Vseams being of equal extensibility and the material between successive seams being of uniform thickness and extensibility, said seams being at least equal in thickness to three of said strips.

6. A flexible hose comprising a tubular Wall having an impervious tubular lining of rubber material and a reinforcement of fabric strips of equal Width and extensibility extending longitudinally of the hose parallel to its axis at circumferentially successive positions about the lining, the longitudinal margins of circumferentially successive strips overlapping one another by equal amounts in a plurality of overlapped seams of equal width and extensibility extending lungitudinally of the hose in equally spaced relation about its circumference providing balanced resistance to elongation about the Wall under fluid pressure within the hose and the thickness of the reinforcement at the regions of the overlapped seams being greater than the thickness of the reinforcement therebetween.

7. A flexible hose comprising a tubular Wall having an impervious tubular lining of rubber material and a reinforcement of fabric strips of equal width and extensibility extending longitudinally of the hose parallel to its axis at circumferentially successive positions about the lining, the width of each strip being less than the circumference of the lining, the longitudinal vmargins of circumferentially successive strips overlapping one another by equal amounts in a plurality of overlapped seams of equal Width and extensibility extending longitudinally of the hose in equally spaced relation about its circumference providing balanced resistance to elongation about the Wall under fluid pressure within the hose.

8. A flexible hose comprising a tubular Wall having an impervious tubular lining of rubber material and a reinforcement of fabric strips of equal width and extensibility extending longitudinally of the hose parallel to its axis at circumferentially successive positions about the lining, said strips each being equalin width to the circumference of the` hose divided by one half of the number of strips plus the Width of an overlapping seam, the longitudinal margins of circumferentially successive strips overlapping one another by equal amounts to provide a plurality of overlapped seams of equal width and extensibility extending longitudinally of the hose in equally spaced relation about its circumference providing balanced resistance to elongation about the Wall under iiuid pressure within the hose.

having one of its margins vexposed at the outer surface ofthe reinforcement and. its other margin exposed attheinner surface of the reinforcement, and the thickness'of the reinforcement at the regions of the overlapped seams being greater than the thickness of the reinforcement therebetween.

10. A exible hose comprising a tubularwall` having an impervious tubular lining of rubber material and a reinforcement of straight-laid Woven fabric strips of equal Width and extensibility extending longitudinally of the hose parallel to its axis at circumferentially successive positions about the lining, each strip having warp elements extending longitudinally of the strip and weft elements extending crosswise of the strip, `the longitudinal margins of circumferentially successive strips overlapping one another by equal amounts in a plurality of overlapped seams of equal Width and extensibility extending longitudinally of the hose in equally spaced relation about its circumference providing balanced resistance to elongationy about the Wall under fluid pressurewthinthe hose.

CARROLL P. KRUPP.

REFERENCES CITED The following references are of record in the iile of this patent:

UNITED STATES PATENTS 

